#include<stdio.h>
#include<string.h>
#include<Windows.h>
int main()
{
	char arr1[] = "welcome to bit!!!!!!!!!!!!";
	char arr2[] = "##########################";
	int left = 0;
	int right = strlen(arr1) - 1;
	while (left <= right)
	{
		arr2[left] = arr1[left];
		arr2[right] = arr1[right];
		printf("%s\n", arr2);
		Sleep(1000);		//寧땍넋埼법넋金口섯취덜쯤
		system("cls");		//헌왕팁캥덜쯤
		left++;
		right--;
	}
	printf("%s\n", arr2);   //最后一次清空了屏幕，重新打印.
    return 0;
}